Minière Marine, Boutin Olivier, Soric Audrey
Aix Marseille Univ, CNRS, Centrale Marseille, M2P2, Marseille, France.
Environ Sci Pollut Res Int. 2017 Mar;24(8):7693-7704. doi: 10.1007/s11356-017-8435-5. Epub 2017 Jan 25.
Experimental coupling of wet air oxidation process and aerobic packed-bed biofilm reactor is presented. It has been tested on phenol as a model refractory compound. At 30 MPa and 250 °C, wet air oxidation batch experiments led to a phenol degradation of 97% and a total organic carbon removal of 84%. This total organic carbon was mainly due to acetic acid. To study the interest of coupling processes, wet air oxidation effluent was treated in a biological treatment process. This step was made up of two packed-bed biofilm reactors in series: the first one acclimated to phenol and the second one to acetic acid. After biological treatment, phenol and total organic carbon removal was 99 and 97% respectively. Thanks to parameters from literature, previous studies (kinetic and thermodynamic) and experimental data from this work (hydrodynamic parameters and biomass characteristics), both treatment steps were modelled. This modelling allows the simulation of the coupling process. Experimental results were finally well reproduced by the continuous coupled process model: relative error on phenol removal efficiency was 1 and 5.5% for wet air oxidation process and packed-bed biofilm reactor respectively.
介绍了湿式空气氧化工艺与好氧填充床生物膜反应器的实验耦合。以苯酚作为难降解化合物模型进行了测试。在30MPa和250℃下，湿式空气氧化间歇实验中苯酚降解率达97%，总有机碳去除率达84%。这种总有机碳主要源于乙酸。为研究耦合工艺的优势，对湿式空气氧化出水进行生物处理。该步骤由两个串联的填充床生物膜反应器组成：第一个适应苯酚，第二个适应乙酸。生物处理后，苯酚和总有机碳的去除率分别为99%和97%。借助文献参数、先前研究（动力学和热力学）以及本研究的实验数据（流体动力学参数和生物质特性），对两个处理步骤进行了建模。该建模可模拟耦合过程。连续耦合过程模型最终很好地再现了实验结果：湿式空气氧化工艺和填充床生物膜反应器的苯酚去除效率相对误差分别为1%和5.5%。
